Hozelock Bioforce Revolution Pond Filter 9000

Wow what a revolutionary idea! Quote REV in shopping basket for free delivery.Unlike the sponges in all of the pond filters that have gone before it the Bioforce Revolution employs a mechanical filter consisting of many little square foam blocks. When in position with the pump running as usual these filters join together to create an effective filter barrier.BUT switch off your pump and turn the cleaning handle on your filter the solid ring of foam breaks down into individual pieces that bang together and dislodge dirt.Switch on your pump and direct the water to waste and watch in amazement as the dirty water goes to your drain.After 20 seconds or so or until water runs clear switch water direction back to your pond.So simple....sure to be a winning idea!